2 thoughts on “Raytheon 6414 Black Plates”

I used this in McIntosh 275. Overall a great looking tube with great sound quality – warm and rich sounding with great transparent top. However, it’s not as transparent as Telefunken 12at7 short, gray smooth plates. The difference in sound maybe 10%.

Also tried it in Dared VP-300B. The same results – good sound, but transparency is not as good as the best tubes out there. Compared it to RCA 5963 – RCA is a clear winner, but again the difference is 5% – hardly noticeable.